Adolf johnsen



Patented Sept. 6, I898.

A. JOHNSEN. VELOCIPEDE DRIVING GEAR.

(Application filed July 30, 1897.)

(No Model.)

' 'mz "ohms PETERS cu, FHDTO-LH'HCL, wAsnmorou, p. c.

with ATES ADOLF J OHNSEN, OF ADELBY, GERMANY.

VELOCIPEDE DRlViNG-GEAR.

SPECIFICATION forming part of Letters Patent.No. 610,236, dated September 6, 1898.

Application filed July 30, 1897. Serial No. 64:6,540. (No model.)

To aZZ whom it may concern:

Be it known that I, ADOLF JoHNsEN, pastor, of Adelby, near Flensburg, in the Kingdom of Prussia, German Empire, have a invented new and useful Improvements in Driving- Gears for Velocipedes and Like Vehicles, of which the following is a specification.

My invention relates to a driving-gear for velocipedes, carriages, and the like whereby a rotary motion is transmitted to the drivingshaft and the locomotion of the vehicle effected simply by the up-and-down movement 7 of two bilateral racks, each of them furnished with a pedal, the said racks also engaging with an intervening toothed Wheel.

In the accompanying drawings, Figure 1 is a front view; Fig. 2, a section through line 00 at of Fig. 1, and Fig. 3 a plan of Fig. l.

I provide two racks b I), having slots a, running on pins (1, and the teeth 5 of the said racks engage with a toothed wheel 0 in such manner that when the rack 19 moves downward the rack b is moved upward, and vice versa, the upward and. downward movements of the racks being brought about by the pedals d, which are fixed for this purpose to the lower ends of the racks. The racks 121) are also provided with side teeth b which engage alternately with the toothed wheels e. These wheels are only toothed on half their circumference and are rigidly attached to the shaft f, their position being such that they are only in gear with the downwardmoving rack, during which time the second rack can move upward without hindrance. A chain-wheel g on the shaft f transmits through chain f the rotary movement of the shaft f to the driving-shaft h. The bearing of the shaft c,'carrying the toothed wheel a, as well as that of the shaft f, may be constructed in any manner suited to the frame of the cycle or other vehicle.

Having now described myinvention, What I claim, and desire to secure by Letters Patent, is

In the driving-gear described, the combi nation of the shaft f to be driven, the parallel wheels e fixed on said shaft and each having one half of its periphery toothed and the other half smooth, the peripherally-toothed Wheel 0 mounted on a shaft and disposed at right angles to the wheels 6 and arranged between the longitudinalvertical planes of said wheels 6 and the vertically-movable, pedal-racks disposed at opposite sides of the wheel 0 and in the same vertical planes as the wheels e; the said racks each being formed in one piece and having teeth on their inner sides in mesh with those of the wheel 0 and teeth on their faces or sides contiguous to wheels 6 adapted to mesh with the teeth of said wheels 6 and also having longitudinal slots for the reception of guide-pins, substantially as specified.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

ADOLF JOHNSEN.

Witnesses:

G. MULLER, RoPKE. 

